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This Defense Intelligence Reference Document from the Defense Intelligence Agency is dated 2 April 2010 and was produced under the Advanced Aerospace Weapon System Applications (AAWSA) Program. It is one of a series of advanced technology reports from FY 2009. It reviews general relativistic warp drives, the cosmological constant, Casimir energy and extra space dimensions. It proposes that dark energy may come from higher dimensions and that controlling those dimensions could one day make a warp drive possible.
“The Advance”11 pages
UNCLASSIFIED/ ire~ err1c1111t t!!C CHE I Table 2. Negative Energy Required for Warp Bubble (Larger Negative Energy) Warp Factor, Vw~rr Ewarp (J) 10 .s (= 3 km/s) -3.03 X 1040 10-• (= 30 km/s) -3.03 X IQ--ll 0.01 (= 3,000 km/s) -3.03 X l046 0.5 (= 150,000 km/s) -7.59x 10-+9 I (= light speed) -3.03 x l0~ 0 2 (= 600,000 km/s) -1.21 X l0 51 10 (= 3.0 x l06 km/s) -3.03 x l0~ 2 l00 (= 3.0 x l0 7 km/s) -3.03 X l0~ 4 Assume: R=SOm. cr= IO'm- 1 Lobo and Visser (Reference 12) constructed an improved model of the warp drive spacetime by applying linearized gravity to the weak-field warp drive case and testing the energy conditions to first and second orders of l'warp• The fundamental basis of their model is that it specifically includes a finite mass spaceship that interacts with the warp bubble. Their results verified that all warp drive spacetimes violate the energy conditions and will continue to do so for arbitrarily low warp bubble speed. They also found that the energy condition violations in this class of spacetimes is generic to the form of the geometry under consideration and is not a side effect of the superluminal properties. Based on these facts plus Equation (2.3) and Table 2, it appears that for all conceivable laboratory experiments in which negative energy can be created in minute amounts, the warp bubble speed will be absurdly low. Coupling of the finite spaceship mass with the warp bubble leads to the (quite reasonable) condition that the net total energy stored in the warp bubble be less than the total rest-energy of the spaceship itself, which places a strong constraint upon the (dimensionless) speed of the warp bubble (Reference 3): (2.4) where Mship and R,hip are the mass and size of the spaceship, respectively, and R is the radius of the warp bubble. Equation (2.4) indicates that for any reasonable values of the engineering parameters inside the brackets, Vwarp will be absurdly low. This result is due to the intrinsic nonlinearity of the general relativistic field equation. To illustrate this point, the example starship parameters from Table 2 (R = 50 m, A ~ 1/a = 10-3 m) are inserted into Equation (2.4) and assume M,tnr = 10 6 kg to find that l'warp :;; 1.72 x 10 14 (or 5.16 x 10 6 m/s). Garden snails can crawl faster than this. And if Rand Msllip 3 UNCLASSIFIED//F8ft 8FFl61.rtls Wlii 8Plls¥
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Report, from the dia collection. The PDF is mirrored here; the original link is above. 33 pages are in the text index: search them above, or from the library's search.